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expression feedrates

hello ,


i would like to put an expression in tab cut feed

unfortunately for me i can't , only a value is possible ! Smiley Sad


you have solution ?


thanks for the help.


Re: expression feedrates

[ Edited ]

You can do it in postprocessor. I have a same project for ABB water jet robot, and feed is a function of material thickness.

Re: expression feedrates

How you did it? External DLL? 

Re: expression feedrates

nice !!


my siemens partner found me a solution :


"No formula is kept in menus machining operation. You can use a mathematical formula but it is evaluated and the result appears in the menu immediately.


for ouptut CLS solution is to use variables in your CN and type these formulas using UDE Insert"

Re: expression feedrates

IMHO :-)

I abhor the "INSERT" UDE

It gets you around the immediate problem, but is VERY non-portable (across machines/controllers/etc.).


If you know how & have the time, I'd come back and create a specific UDE for this (e.g. "Feedrate variables") then you could set a different variable for specific types of feedrates (e.g. engage/cut/retract/etc.)





Ken Akerboom Sr CAx Systems Engr, Moog, Inc.
Production: NX10.0.3.5 MP5 + patch/TC11.2
I'd rather be e-steemed than e-diseaseled

Re: expression feedrates

ken ,


i agree with you but i don't have acess at Post processor ! just the CLS file


Cut = 200

engage = (cut * ( 50%)) : it's ok with nx !

cut_aera = (cut * (50%)) Smiley Sad



Re: expression feedrates

How about using feed rate optimization introduced with NX8?

This reduces the feed rate according to the amount of removed material.

Stefan Pendl, Systemmanager CAx, HAIDLMAIR GmbH
Production: NX10.0.3, VERICUT 8.0, FBM, MRL 3.1.4 | TcUA 10.1 MP7 Patch 0 ( | TcVis 10.1
Development: VB.NET, Tcl/Tk    Testing: NX11.0 EAP, NX12.0 EAP

How to Get the Most from Your Signature in the Community

Re: expression feedrates

thanks stefan , but i don't understand this method for 5 axes


Re: expression feedrates

What is "cut_aera"? I am not familiar with the term.


Are you trying to set NX motion types hased on the cut feed? This is there in NX8.

Mark Rief
Retired Siemens

Re: expression feedrates

Mark ,


"What is "cut_aera"? I am not familiar with the term."



"Are you trying to set NX motion types hased on the cut feed? This is there in NX8."


that is this function like stefan says ?



because i don't know how to use this function for 5 axes toolpath ??

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